summaryrefslogtreecommitdiffstats
path: root/drivers/pci/hotplug/acpiphp.h
blob: 2b859249303b8088352995bc23b57c47f7c36472 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
/*
 * ACPI PCI Hot Plug Controller Driver
 *
 * Copyright (C) 1995,2001 Compaq Computer Corporation
 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
 * Copyright (C) 2001 IBM Corp.
 * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
 * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
 * Copyright (C) 2002,2003 NEC Corporation
 * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
 * Copyright (C) 2003-2005 Hewlett Packard
 *
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 * NON INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Send feedback to <gregkh@us.ibm.com>,
 *		    <t-kochi@bq.jp.nec.com>
 *
 */

#ifndef _ACPIPHP_H
#define _ACPIPHP_H

#include <linux/acpi.h>
#include <linux/mutex.h>
#include <linux/pci_hotplug.h>

struct acpiphp_context;
struct acpiphp_bridge;
struct acpiphp_slot;

/*
 * struct slot - slot information for each *physical* slot
 */
struct slot {
	struct hotplug_slot	*hotplug_slot;
	struct acpiphp_slot	*acpi_slot;
	struct hotplug_slot_info info;
	unsigned int sun;	/* ACPI _SUN (Slot User Number) value */
};

static inline const char *slot_name(struct slot *slot)
{
	return hotplug_slot_name(slot->hotplug_slot);
}

/*
 * struct acpiphp_bridge - PCI bridge information
 *
 * for each bridge device in ACPI namespace
 */
struct acpiphp_bridge {
	struct list_head list;
	struct list_head slots;
	struct kref ref;

	struct acpiphp_context *context;

	int nr_slots;

	/* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
	struct pci_bus *pci_bus;

	/* PCI-to-PCI bridge device */
	struct pci_dev *pci_dev;

	bool is_going_away;
};


/*
 * struct acpiphp_slot - PCI slot information
 *
 * PCI slot information for each *physical* PCI slot
 */
struct acpiphp_slot {
	struct list_head node;
	struct pci_bus *bus;
	struct list_head funcs;		/* one slot may have different
					   objects (i.e. for each function) */
	struct slot *slot;

	u8		device;		/* pci device# */
	u32		flags;		/* see below */
};


/*
 * struct acpiphp_func - PCI function information
 *
 * PCI function information for each object in ACPI namespace
 * typically 8 objects per slot (i.e. for each PCI function)
 */
struct acpiphp_func {
	struct acpiphp_bridge *parent;
	struct acpiphp_slot *slot;

	struct list_head sibling;

	u8		function;	/* pci function# */
	u32		flags;		/* see below */
};

struct acpiphp_context {
	struct acpi_hotplug_context hp;
	struct acpiphp_func func;
	struct acpiphp_bridge *bridge;
	unsigned int refcount;
};

static inline struct acpiphp_context *to_acpiphp_context(struct acpi_hotplug_context *hp)
{
	return container_of(hp, struct acpiphp_context, hp);
}

static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
{
	return container_of(func, struct acpiphp_context, func);
}

static inline struct acpi_device *func_to_acpi_device(struct acpiphp_func *func)
{
	return func_to_context(func)->hp.self;
}

static inline acpi_handle func_to_handle(struct acpiphp_func *func)
{
	return func_to_acpi_device(func)->handle;
}

/*
 * struct acpiphp_attention_info - device specific attention registration
 *
 * ACPI has no generic method of setting/getting attention status
 * this allows for device specific driver registration
 */
struct acpiphp_attention_info
{
	int (*set_attn)(struct hotplug_slot *slot, u8 status);
	int (*get_attn)(struct hotplug_slot *slot, u8 *status);
	struct module *owner;
};

/* ACPI _STA method value (ignore bit 4; battery present) */
#define ACPI_STA_ALL			(0x0000000f)

/* slot flags */

#define SLOT_ENABLED		(0x00000001)
#define SLOT_IS_GOING_AWAY	(0x00000002)

/* function flags */

#define FUNC_HAS_STA		(0x00000001)
#define FUNC_HAS_EJ0		(0x00000002)

/* function prototypes */

/* acpiphp_core.c */
int acpiphp_register_attention(struct acpiphp_attention_info*info);
int acpiphp_unregister_attention(struct acpiphp_attention_info *info);
int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot, unsigned int sun);
void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);

/* acpiphp_glue.c */
typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);

int acpiphp_enable_slot(struct acpiphp_slot *slot);
int acpiphp_disable_slot(struct acpiphp_slot *slot);
u8 acpiphp_get_power_status(struct acpiphp_slot *slot);
u8 acpiphp_get_attention_status(struct acpiphp_slot *slot);
u8 acpiphp_get_latch_status(struct acpiphp_slot *slot);
u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot);

/* variables */
extern bool acpiphp_disabled;

#endif /* _ACPIPHP_H */
OpenPOWER on IntegriCloud